Descriptive Statistics
The process of ensuring that each member of the population has an equal probability of appearing in the sample
What is random sampling?
The goal of almost every research study is to reject this hypothesis.
What is the null hypothesis?
Degrees of freedom is directly related to this.
What is the sample size?
Tests conducted after a significant F statistics for an ANOVA.
What are post hoc tests and/or tests of effect size?
This measure of effect size calculates the size of the effect in terms of standard deviation units.
What is Cohen’s d?
This kind of frequency distribution graph shows the frequencies as bars, with no space between adjacent bars.
What is a histogram?
The value of p when you reject the null hypothesis.
What is less than alpha (.05 or 5%)?
If the absolute value of our obtained t is greater than the absolute value of our critical t.
What is "rejecting the null hypothesis in a t-test"?
The approximate value of your obtained F statistic if there is NO effect of your treatment.
What is 1 (or close to 1)?
This measure of effect size is used to estimate a range in which the population parameter is likely derived from the sample statistic.
What is a confidence interval?
This measure of central tendency reports the mathematical average of a set of scores.
What is the mean?
The type of error you may be making if you incorrectly reject the null hypothesis.
What is Type I error?
The shape that a t distribution resembles as N increases.
What is the normal distribution (or z distribution)?
Since everyone within a particular group receives the same treatment, this is what within-variability is affected by in an experiment.
What is error (or chance)?
The symbol for the coefficient of determination.
What is r2?
This type of measurement is involved when you are measuring a person’s age (years).
What is a ratio scale?
This is the other name for the standard deviation of the sampling distribution of the means.
What is the standard error?
The approximate value of the obtained t statistic if there is NO effect of your treatment.
What is 0 (or close to 0)?
The top of the F ratio.
What is between-group variability, MSbetween, or treatment plus error?
These are the two critical assumptions for a t-test.
What is normality and independence?
The purpose of these is to transform raw scores into a common unit of measurement.
What are z scores?
This is what is minimized when power is maximized. (Hint: 1-power = ?)
What is beta or the probability of making a type II error?
The degrees of freedom for a test comparing blood pressure scores for a new medication compared to a placebo, where 20 participants received the new medication and 24 received the placebo.
What is 42?
If n = 10, k = 4, and N = 40, what is the value of dfTreatment?
What is 3?
This is what you can conclude about effect size from a significant statistical test.
What is nothing?